/*
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1994
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley
 * by Pace Willisson (pace@blitz.com).  The Rock Ridge Extension
 * Support code is derived from software contributed to Berkeley
 * by Atsushi Murai (amurai@spec.co.jp).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)iso.h	8.6 (Berkeley) 5/10/95
 */

#ifndef ISO_H
#define	ISO_H

#define	ISODCL(from, to) (to - from + 1)

struct iso_volume_descriptor {
	char type[ISODCL(1, 1)]; /* 711 */
	char id[ISODCL(2, 6)];
	char version[ISODCL(7, 7)];
	char unused[ISODCL(8, 8)];
	char type_sierra[ISODCL(9, 9)]; /* 711 */
	char id_sierra[ISODCL(10, 14)];
	char version_sierra[ISODCL(15, 15)];
	char data[ISODCL(16, 2048)];
};

/* volume descriptor types */
#define	ISO_VD_PRIMARY 1
#define	ISO_VD_SUPPLEMENTARY 2
#define	ISO_VD_END 255

#define	ISO_STANDARD_ID "CD001"
#define	ISO_ECMA_ID	"CDW01"

#define	ISO_SIERRA_ID	"CDROM"

struct iso_primary_descriptor {
	uchar_t type			[ISODCL(1,	1)]; /* 711 */
	char id				[ISODCL(2,	6)];
	char version			[ISODCL(7,	7)]; /* 711 */
	char unused1			[ISODCL(8,	8)];
	char system_id			[ISODCL(9,  40)]; /* achars */
	char volume_id			[ISODCL(41,  72)]; /* dchars */
	char unused2			[ISODCL(73,  80)];
	char volume_space_size		[ISODCL(81,  88)]; /* 733 */
	char unused3			[ISODCL(89, 120)];
	char volume_set_size		[ISODCL(121, 124)]; /* 723 */
	char volume_sequence_number	[ISODCL(125, 128)]; /* 723 */
	uchar_t logical_block_size	[ISODCL(129, 132)]; /* 723 */
	char path_table_size		[ISODCL(133, 140)]; /* 733 */
	char type_l_path_table		[ISODCL(141, 144)]; /* 731 */
	char opt_type_l_path_table	[ISODCL(145, 148)]; /* 731 */
	char type_m_path_table		[ISODCL(149, 152)]; /* 732 */
	char opt_type_m_path_table	[ISODCL(153, 156)]; /* 732 */
	char root_directory_record	[ISODCL(157, 190)]; /* 9.1 */
	char volume_set_id		[ISODCL(191, 318)]; /* dchars */
	char publisher_id		[ISODCL(319, 446)]; /* achars */
	char preparer_id		[ISODCL(447, 574)]; /* achars */
	char application_id		[ISODCL(575, 702)]; /* achars */
	char copyright_file_id		[ISODCL(703, 739)]; /* 7.5 dchars */
	char abstract_file_id		[ISODCL(740, 776)]; /* 7.5 dchars */
	char bibliographic_file_id	[ISODCL(777, 813)]; /* 7.5 dchars */
	char creation_date		[ISODCL(814, 830)]; /* 8.4.26.1 */
	char modification_date		[ISODCL(831, 847)]; /* 8.4.26.1 */
	char expiration_date		[ISODCL(848, 864)]; /* 8.4.26.1 */
	char effective_date		[ISODCL(865, 881)]; /* 8.4.26.1 */
	char file_structure_version	[ISODCL(882, 882)]; /* 711 */
	char unused4			[ISODCL(883, 883)];
	char application_data		[ISODCL(884, 1395)];
	char unused5			[ISODCL(1396, 2048)];
} __packed;
#define ISO_DEFAULT_BLOCK_SHIFT		11
#define ISO_DEFAULT_BLOCK_SIZE		(1 << ISO_DEFAULT_BLOCK_SHIFT)

/*
 * Used by Microsoft Joliet extension to ISO9660. Almost the same
 * as PVD, but byte position 8 is a flag, and 89-120 is for escape.
 */

struct iso_supplementary_descriptor {
	char type				[ISODCL(1,   1)]; /* 711 */
	char id				[ISODCL(2,   6)];
	char version			[ISODCL(7,   7)]; /* 711 */
	char flags			[ISODCL(8,   8)]; /* 711? */
	char system_id			[ISODCL(9,  40)]; /* achars */
	char volume_id			[ISODCL(41,  72)]; /* dchars */
	char unused2			[ISODCL(73,  80)];
	char volume_space_size		[ISODCL(81,  88)]; /* 733 */
	char escape			[ISODCL(89, 120)];
	char volume_set_size		[ISODCL(121, 124)]; /* 723 */
	char volume_sequence_number	[ISODCL(125, 128)]; /* 723 */
	char logical_block_size		[ISODCL(129, 132)]; /* 723 */
	char path_table_size		[ISODCL(133, 140)]; /* 733 */
	char type_l_path_table		[ISODCL(141, 144)]; /* 731 */
	char opt_type_l_path_table	[ISODCL(145, 148)]; /* 731 */
	char type_m_path_table		[ISODCL(149, 152)]; /* 732 */
	char opt_type_m_path_table	[ISODCL(153, 156)]; /* 732 */
	char root_directory_record	[ISODCL(157, 190)]; /* 9.1 */
	char volume_set_id		[ISODCL(191, 318)]; /* dchars */
	char publisher_id			[ISODCL(319, 446)]; /* achars */
	char preparer_id			[ISODCL(447, 574)]; /* achars */
	char application_id		[ISODCL(575, 702)]; /* achars */
	char copyright_file_id		[ISODCL(703, 739)]; /* 7.5 dchars */
	char abstract_file_id		[ISODCL(740, 776)]; /* 7.5 dchars */
	char bibliographic_file_id	[ISODCL(777, 813)]; /* 7.5 dchars */
	char creation_date		[ISODCL(814, 830)]; /* 8.4.26.1 */
	char modification_date		[ISODCL(831, 847)]; /* 8.4.26.1 */
	char expiration_date		[ISODCL(848, 864)]; /* 8.4.26.1 */
	char effective_date		[ISODCL(865, 881)]; /* 8.4.26.1 */
	char file_structure_version	[ISODCL(882, 882)]; /* 711 */
	char unused4			[ISODCL(883, 883)];
	char application_data		[ISODCL(884, 1395)];
	char unused5			[ISODCL(1396, 2048)];
};

struct iso_sierra_primary_descriptor {
	char unknown1			[ISODCL(1,	8)]; /* 733 */
	char type			[ISODCL(9,	9)]; /* 711 */
	char id				[ISODCL(10,  14)];
	char version			[ISODCL(15,  15)]; /* 711 */
	char unused1			[ISODCL(16,  16)];
	char system_id			[ISODCL(17,  48)]; /* achars */
	char volume_id			[ISODCL(49,  80)]; /* dchars */
	char unused2			[ISODCL(81,  88)];
	char volume_space_size		[ISODCL(89,  96)]; /* 733 */
	char unused3			[ISODCL(97, 128)];
	char volume_set_size		[ISODCL(129, 132)]; /* 723 */
	char volume_sequence_number	[ISODCL(133, 136)]; /* 723 */
	char logical_block_size		[ISODCL(137, 140)]; /* 723 */
	char path_table_size		[ISODCL(141, 148)]; /* 733 */
	char type_l_path_table		[ISODCL(149, 152)]; /* 731 */
	char opt_type_l_path_table	[ISODCL(153, 156)]; /* 731 */
	char unknown2			[ISODCL(157, 160)]; /* 731 */
	char unknown3			[ISODCL(161, 164)]; /* 731 */
	char type_m_path_table		[ISODCL(165, 168)]; /* 732 */
	char opt_type_m_path_table	[ISODCL(169, 172)]; /* 732 */
	char unknown4			[ISODCL(173, 176)]; /* 732 */
	char unknown5			[ISODCL(177, 180)]; /* 732 */
	char root_directory_record	[ISODCL(181, 214)]; /* 9.1 */
	char volume_set_id		[ISODCL(215, 342)]; /* dchars */
	char publisher_id		[ISODCL(343, 470)]; /* achars */
	char preparer_id		[ISODCL(471, 598)]; /* achars */
	char application_id		[ISODCL(599, 726)]; /* achars */
	char copyright_id		[ISODCL(727, 790)]; /* achars */
	char creation_date		[ISODCL(791, 806)]; /* ? */
	char modification_date		[ISODCL(807, 822)]; /* ? */
	char expiration_date		[ISODCL(823, 838)]; /* ? */
	char effective_date		[ISODCL(839, 854)]; /* ? */
	char file_structure_version	[ISODCL(855, 855)]; /* 711 */
	char unused4			[ISODCL(856, 2048)];
};

struct iso_directory_record {
	uchar_t length			[ISODCL(1, 1)]; /* 711 */
	uchar_t ext_attr_length		[ISODCL(2, 2)]; /* 711 */
	uchar_t extent			[ISODCL(3, 10)]; /* 733 */
	uchar_t size			[ISODCL(11, 18)]; /* 733 */
	char date			[ISODCL(19, 25)]; /* 7 by 711 */
	uchar_t flags			[ISODCL(26, 26)];
	char file_unit_size		[ISODCL(27, 27)]; /* 711 */
	char interleave			[ISODCL(28, 28)]; /* 711 */
	char volume_sequence_number	[ISODCL(29, 32)]; /* 723 */
	uchar_t name_len			[ISODCL(33, 33)]; /* 711 */
	char name			[1];			/* XXX */
} __packed;
/*
 * can't take sizeof(iso_directory_record), because of possible alignment
 * of the last entry (34 instead of 33)
 */
#define	ISO_DIRECTORY_RECORD_SIZE	33

struct iso_extended_attributes {
	uchar_t owner			[ISODCL(1, 4)]; /* 723 */
	uchar_t group			[ISODCL(5, 8)]; /* 723 */
	uchar_t perm			[ISODCL(9, 10)]; /* 9.5.3 */
	char ctime			[ISODCL(11, 27)]; /* 8.4.26.1 */
	char mtime			[ISODCL(28, 44)]; /* 8.4.26.1 */
	char xtime			[ISODCL(45, 61)]; /* 8.4.26.1 */
	char ftime			[ISODCL(62, 78)]; /* 8.4.26.1 */
	char recfmt			[ISODCL(79, 79)]; /* 711 */
	char recattr			[ISODCL(80, 80)]; /* 711 */
	uchar_t reclen			[ISODCL(81, 84)]; /* 723 */
	char system_id			[ISODCL(85, 116)]; /* achars */
	char system_use			[ISODCL(117, 180)];
	char version			[ISODCL(181, 181)]; /* 711 */
	char len_esc			[ISODCL(182, 182)]; /* 711 */
	char reserved			[ISODCL(183, 246)];
	uchar_t len_au			[ISODCL(247, 250)]; /* 723 */
};

#ifdef _KERNEL

/* CD-ROM Format type */
enum ISO_FTYPE	{
	ISO_FTYPE_DEFAULT,
	ISO_FTYPE_9660,
	ISO_FTYPE_RRIP,
	ISO_FTYPE_JOLIET,
	ISO_FTYPE_ECMA,
	ISO_FTYPE_HIGH_SIERRA
};

#ifndef	ISOFSMNT_ROOT
#define	ISOFSMNT_ROOT	0
#endif

/*
 * When ino_t becomes 64-bit, we can remove this definition in favor of ino_t.
 */
typedef __uint64_t cd_ino_t;

struct iso_mnt {
	uint64_t im_flags;

	struct mount *im_mountp;
	struct cdev *im_dev;
	struct vnode *im_devvp;

	struct g_consumer *im_cp;
	struct bufobj *im_bo;

	int logical_block_size;
	int im_bshift;
	int im_bmask;

	int volume_space_size;

	char root[ISODCL(157, 190)];
	int root_extent;
	int root_size;
	enum ISO_FTYPE	iso_ftype;

	int rr_skip;
	int rr_skip0;

	int joliet_level;

	void *im_d2l;
	void *im_l2d;
};

struct ifid {
	ushort_t	ifid_len;
	ushort_t	ifid_pad;
	cd_ino_t	ifid_ino;
	long		ifid_start;
};

#define	VFSTOISOFS(mp)	((struct iso_mnt *)((mp)->mnt_data))

#define	blkoff(imp, loc)	((loc) & (imp)->im_bmask)
#define	lblktosize(imp, blk)	((blk) << (imp)->im_bshift)
#define	lblkno(imp, loc)	((loc) >> (imp)->im_bshift)
#define	blksize(imp, ip, lbn)	((imp)->logical_block_size)

int cd9660_vget_internal(struct mount *, cd_ino_t, int, struct vnode **, int,
    struct iso_directory_record *);
#define cd9660_sysctl ((int (*)(int *, u_int, void *, size_t *, void *, \
				size_t, struct proc *))eopnotsupp)

extern struct vop_vector cd9660_vnodeops;
extern struct vop_vector cd9660_fifoops;

int isochar(uchar_t *, uchar_t *, int, ushort_t *, int *, int, void *);
int isofncmp(uchar_t *, int, uchar_t *, int, int, int, void *, void *);
void isofntrans(uchar_t *, int, uchar_t *, ushort_t *, int, int, int, int, void *);
cd_ino_t isodirino(struct iso_directory_record *, struct iso_mnt *);
ushort_t sgetrune(const char *, size_t, char const **, int, void *);

#endif /* _KERNEL */

/*
 * The isonum_xxx functions are inlined anyway, and could come handy even
 * outside the kernel.  Thus we don't hide them here.
 */

/*
 * 7xy
 *  x -> 1 = 8 bits, 2 = 16 bits, 3 = 32 bits
 *   y -> 1 = little-endian, 2 = big-endian, 3 = both (le then be)
 */

static __inline uint8_t
isonum_711(const unsigned char *p)
{

	return (p[0]);
}

static __inline int8_t
isonum_712(const unsigned char *p)
{

	return ((signed char)p[0]);
}

static __inline uint8_t
isonum_713(const unsigned char *p)
{

	return (p[0]);
}

static __inline uint16_t
isonum_721(const unsigned char *p)
{

	return (p[0] | p[1] << 8);
}

static __inline uint16_t
isonum_722(const unsigned char *p)
{

	return (p[1] | p[0] << 8);
}

static __inline uint16_t
isonum_723(const unsigned char *p)
{

	return (p[0] | p[1] << 8);
}

static __inline uint32_t
isonum_731(const unsigned char *p)
{

	return (p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24);
}

static __inline uint32_t
isonum_732(const unsigned char *p)
{

	return (p[3] | p[2] << 8 | p[1] << 16 | p[0] << 24);
}

static __inline uint32_t
isonum_733(const unsigned char *p)
{

	return (p[0] | p[1] << 8 | p[2] << 16 | p[3] << 24);
}

/*
 * Associated files have a leading '='.
 */
#define	ASSOCCHAR	'='

#endif	/* ISO_H */
